Conduit connection



Patented Feb. 4, 1941 stanley H. Franklin, Fremnt,

Manufacturing. Company, 'a corpora- Fleming y tion ofV Rhode Island Ohio, assig'nor to.

vApplication December 20,1937, seria-1- Nd; 180,721

. i claims.' (C1. 2am-*1482) This Ainventionrelates to `the threading of -a connection into a casing, and is particularly adapted forthe casing of an oil lter in connection with which the invention is illustrated. An 'objectl of the invention ls to preventa leak about the connection of`a tubing 'or pipe to the casing which may occur in use. l

A more specific object of the invention is the strengthening of the walls in which threads for the connection are placed so as to strengthen and enforce these walls.

Another object of the invention is the holding of the reinforcing and strengthening part securely in position at the time the opening is formed.

A further object of the invention is the simple method by which these parts are assembled in position.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a side elevation of a iilter to which this invention is applied;

Fig. 2 is a sectional view of 'the filter casingy shown as cut through both of the openings in the casing;

Fig. 3 is a section on line 3--3 of Fig. 1;

Fig. 4 is a perspective view of the reinforcing member alone;

Figs. 5, 6 and 7 show progressively different steps inthe formation of the opening which is shown in Fig. 3.

In the use of oil filters of the type in which a casing is connected in the flow line of the oil it is usual to form an opening and collar about this opening, which collar is taperingly threaded to receive the connection for the oil iiow lines. Two of such openings are usually provided in the casing, one for the inlet and the other for the outlet,

and splitting due to the taper thread and thin stock has occurred, and the'relatively thin stock of the casing often will be of such a character that, due to vibration, a leak will occur about the 4connections and difficulty has been experienced in formulating the opening of a uniform and accurate size due to the head of the metal and the expansion and contraction which occurs; and in order to obviate these diiiiculties I have reinforced this connection and done so at a point in its manufacture so that the usual provision of the opening serves to secure this reinforcing in place; and the following is a more detailed description of the present embodiment of this invention, illustrating the preferred means by which theseadvantageous'results may be aecom- Plished:" v f -With reference' to the dressing, 'the casing which illustrates this invention is designated generally IIl'and consists of al shell of sheet metal stock for receiving a lter cartridge or thelike,

the casing being reinforced by ribs II in its lower bottom wall I2. 'Ihe side wall I3 of the casing is heated and stretched to bulge the same outwardly as at I4 a distance suicient to form a space for the reception of a collar providing a sufcient length for the threads of the connection.

Into this space there is then positioned a Washer-like member I5 having a circular opening IB therein. The web of stock I 1 which extends across this opening I6 is then pierced. forced inwardly and expanded by means of diiferent tools, one of which is illustrated at I8, so as to cause the stock which formerly formed the web I1 to form a collar I9 of circular formation and which is expanded against the wall 20 of the opening I6 so as to firmly and tightly engage therewith, While at the same time the ends 2| of this collar are bent over the chamfered edges 22 of the member I5 so as to rivet the member securely in position. A tap is then passed into the opening so as to further expand the collar and provide threads 23 which are formed in this manner in a very secure support and one which when the threaded member is attached will still further expand the collar to connect the casing in the flow line of oil will be very secure and will prevent any leaks occurring about the collar or through the threads which connect the parts together.

The opening 25 in the bottom wall of the casing is similarly formed and provided with a reinforcing member except that this opening occurring below the position of the cartridge when it en ters the casing need not have its wall first bulged outwardly but otherwise the attachment is the same as heretofore and the reinforcement is as heretofore stated.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being dened and limited only by the terms of the appended claims.

I claim:

1. A casing comprising a shell having an outwardly bulging portion with an opening therein, an inwardly extending collar about saldopening, and a reinforcing member in said bulging portion and havlng'an opening receiving said collar, said collar being internally threaded. Y 2. The method of providing a, threaded opening in a case winch consists in providing a member with an opening therein located at the point where the opening in the case is to be, punching a. hole in the case and expanding the stock punched into engagement with the Wall about the opening in the member, and then threading the stock so'expanded.

3. The method of providing a threaded opening in a case which consists in providing amember with an opening therein located at the point where the opening in the case is to be, punching a hole in the case and expanding the stock punched into engagement with the wall about the opening in the member and over the'end oi. said member, and then threading the stock so expanded.

4. The method of providing a threaded opening in a case which consists in providing aA member having an opening therein with a smooth cylindrical wall located at the point where the opening in the case is tobe, punching a hole in the-case and expanding the stock punched v.into engagement with the wall about the opening in the member and thenv threading 'the stock so exv panded. y

5. AThe method of providing a threaded opening in a case which consists in providing a member having an opening therein with a smooth cylindrical wall located at the point where the opening in the case is to lbe, punching a hole in the case and expanding the stock punched into engagement with the wall about the opening in the member, and then threading the expanded stock and by such threading operation further expanding the stock into engagement with said wall.

6. A casing comprising a metal shell having an outwardly bulging portion with an opening therein, an inwardly extending collar about said opening, a reinforcing member engaging the inner surface of the bulging portion and of a thickness.

substantially equal to the depth of the recess formed by the bulging portion, said member having an opening therein snugly receiving said co1- lar, said collar being internally threaded.

7. A casing comprising a shell having an outwardly bulging portion with an opening therein. an inwardly extending collar about said opening of no greater extent than said bulgingportion,

.and a reinforcing member wholly within said bulging portion and having an opening receiving said collar, said collar being internally threaded.

STANLEY H. FRANEIIN. 

